Global Patent Index - EP 1318205 A1

EP 1318205 A1 20030611 - THIN STEEL SHEET AND METHOD FOR PRODUCTION THEREOF

Title (en)

THIN STEEL SHEET AND METHOD FOR PRODUCTION THEREOF

Title (de)

DÜNNES STAHLBLECH UND ENTSPRECHENDES HERSTELLUNGSVERFAHREN

Title (fr)

FEUILLE EN ACIER MINCE ET PROCEDE DE PRODUCTION

Publication

EP 1318205 A1 20030611 (EN)

Application

EP 01941087 A 20010619

Priority

  • JP 0105209 W 20010619
  • JP 2000183870 A 20000620
  • JP 2000183871 A 20000620
  • JP 2000195437 A 20000629
  • JP 2000195438 A 20000629
  • JP 2000198652 A 20000630

Abstract (en)

[origin: US2002148536A1] The steel sheet comprises: a ferritic phase having ferritic grains of 10 or more grain size number and ferritic grain boundaries; and at least one kind of Nb precipitates and Ti precipitates. The ferritic grain has a low density region with a low precipitate density in the vicinity of grain boundary. The low density region has a precipitate density of 60% or less to the precipitate density at center part of the ferritic grain. The steel sheet consists essentially of 0.002 to 0.02% C, 1% or less Si, 3% or less Mn, 0.1% or less P, 0.02% or less S, 0.01 to o.1% sol.Al, 0.007% or less N, at least one element of 0.01 mass %, and the balance being Fe.

IPC 1-7

C22C 38/14; C21D 9/46; C22C 38/04; C22C 38/12; C21D 8/04; C21D 9/48

IPC 8 full level

C21D 8/04 (2006.01); C21D 9/48 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C21D 8/02 (2006.01)

CPC (source: EP KR US)

C22C 38/002 (2013.01 - EP); C22C 38/004 (2013.01 - EP); C22C 38/02 (2013.01 - EP); C22C 38/04 (2013.01 - EP KR); C22C 38/06 (2013.01 - EP); C22C 38/12 (2013.01 - EP); C22C 38/14 (2013.01 - EP); C21D 8/0226 (2013.01 - EP); C21D 8/0236 (2013.01 - EP); C21D 8/0273 (2013.01 - EP); C21D 8/0278 (2013.01 - EP); C21D 2211/004 (2013.01 - EP); C21D 2211/005 (2013.01 - EP); Y10T 428/12799 (2015.01 - EP US)

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

US 2002148536 A1 20021017; US 6743306 B2 20040601; CN 1190513 C 20050223; CN 1286999 C 20061129; CN 1383459 A 20021204; CN 1560310 A 20050105; EP 1318205 A1 20030611; EP 1318205 A4 20050803; EP 2312009 A1 20110420; EP 2312010 A1 20110420; KR 100473497 B1 20050309; KR 20020016906 A 20020306; US 2004168753 A1 20040902; US 7252722 B2 20070807; WO 0198552 A1 20011227

DOCDB simple family (application)

US 4390302 A 20020111; CN 01801749 A 20010619; CN 200410031973 A 20010619; EP 01941087 A 20010619; EP 10190623 A 20010619; EP 10190624 A 20010619; JP 0105209 W 20010619; KR 20027000794 A 20020119; US 79254604 A 20040302